Lock.



I. NI. RONALTER & I. P. BAUBY.`

LUCK.

APPLICATION FILED APR. I2. |915.

1,179,042. Patented Apr. 11,1916.

EMEQ..

atten/whom AJOSEPH M. RONALTER AND JOSEPH P. BAUBY, 0F WATERBURY,CONNECTICUT.

LOCK.

Specicatiori of Letters Patent.

, Patented Apr. 11, 1916.

'Application ined April i2, i915. 4 serial ivo. 20,858.

To all whom t may concern:

Be it known that we, JOSEPH M.`RONAL TER and JOSEPH P. BAUBY, citizensof the United States, residing at Waterbury, in the county of New Havenand State of Connecticut, have invented certain new and usefulImprovements in Locks; and we do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Qur invention relates to improvements in locks and latches, moreparticularly to the former.

The object of the invention isto provide an extremely simple andinexpensive look having improved means for retarding a key insertedtherein, thus preventing easy removal of said key by slamming of thedoor, or from other causes.

To this end, the invention tain novel features of construction andcombination of parts hereinafter described and claimed In describing theinvention, we shall referv to the accompanying drawing wherein likereference characters designate correspond-l ing parts throughout theseveral views and wherein;

Figure 1 is a vertical longitudinal section of a lock constructed inaccordance with our invention, the bolt thereof being shown in retractedposition; Fig. 2 is a view similar to Fig. 1 but illustratingy only thelower portion of the lock, the bolt in this view being projected; Fig. 3is a horizontal section as seen along the plane indicated by the line 33 of Fig. l; and Fig. 1 is a plan view of the type of key employed inactuating the lock shown inthe drawings.

In this drawing, constituting a part of the application, 1 designatesany preferred type of casing here shown as constructed in such a manneras to allow the lock to be mortised into the edge of a door. It will beevident, however, that any appropriate casing could well be provided.

Disposed horizontally within the casing 1 and bearing against the lowerside thereof, is a locking bolt 2 whose front body portion is providedwith a slot 3 receiving a.

resides in ceri understood, The rear end of the bolt 2 which is disposedmidway between the two ends of the casing 1, is formed with a notch z inits upper side, thus providing a projection or stop 6 disposed at therear end of the body of said bolt. This rear end is provided with arearwardly extending integral extension plate 7 having near its rear enda projection 8 adapted for engagement with a key 9 inserted vthrough akeyhole 11 formed in the casing, a projection 8 being disposedcontiguous to the keyhole yas clearly shown in Figs. 1 and 2.

Disposed above the bolt 2 and having one of its ends pivotally supportedby any preferred means at 12, is a tumbler arm 13 which is ofsubstantially rectilinear formation, the intermediate portion of saidtumbler arm 13 being spaced above the keyhole 11 and being retainedagainst downward movement by a stop 111 carried by the casing. The arm13 is normally moved into contact with the stop 14, however, by a coiledspring 15 having one of its ends anchored to a hook or the like on theinterior of the casing, whilevits other end is connectedv to a hook 16formed on therear end of said arm. Vhen the tumbler arm is disposed inits lowermost position, a lockingprojection 17 which depends from itsforward end portion, is received by the notch 5 when the bolt isretracted, but abuts the rear side of thestop 6 when said bolt isprojected. Needless to say, it is necessary before projecting orretracting the boltfto raise the tumbler arm 13 bythe insertion of ifsrarns narnia@ onirica. L

a key.. In the present embodiment of the invention, this key is shownmore particu- Y larly in Fig.- 4 as provided with a pair of wings 18projecting laterally in opposite directions from its shank 19,- the keyand the keyhole 11 being of corresponding formation. When this key isinserted and turned in the proper direction, the tumbler arm 13 willfirst be raisedafter which the bolt will be projected or retracted asthe case may be. It becomes expedient, however, to provide simple andefficient meansv for retarding the rotation of the key after it has beeninserted into the lock, thus preventing slammingl of the door andjarring of any sort from removing the key from the keyhole. In order toaccomplish this result, a pair of key checking stops 20 are castintegrally with or lotherwise carried by the lower side of the tumblerarm 13, these stops being thus spaced above the keyhole 11 and above theprojection 8. By this construction, after the key is first inserted withthe wings 1S thereof in horizontal positions, and said key is rotatedapproximately onefourth of a revolution, the uppermost wing thereofcomes into forcible frictional contact with one of the stops 20, thusyieldably retarding rotation of the key. With the key in this position,the lowermost wing thereof is spaced only a. slight distance from theprojection 8 with which it contacts upon further rotation, it beingevident that such rotation will raise the tumbler arm 13 to retract itsstop 17, before the bolt is actuated.

lt is to be observed that the stop ll not only limits the downwardmovement of the tumbler'arm 18, but is positioned in contact with therearmost stop 20. By so doing, rearward thrusts exerted on said arm vbyattempted retraction of the bolt, will be resisted not only by the pivot12 of the arm, but by the stops 20 and 14.

vln conjunction with the parts above described, practically anypreferred type of spring projected catch 2G may be provided, this catchbeing here shown as equipped with a yoke on its rear end engaged by thehead 27 rotated by the shank 2S of the knobs (not shown).

From the foregoing description, taken in connection with theaccompanying drawings, it will be evident that although extremely simpleconstruction has been provided for accomplishing the desired end, the

complete lock will be very efficient in operation and will possess anumber of highly advantageous features.V Particular emphasis is laidupon the provision of the key checking stop means and upon the specificstructure of the bolt and its locking tumbler, these features being themost salient of the Y invention.

Copies of this patent may be obtained for pivoted at its front end abovethe bolt and having its rear end disposed above the keyhole, a stopdepending from the tumbler arm for reception in the aforesaid notch tocontrol the movement of the bolt, a stop beneath the rear end of saidtumbler arm, a spring for normally lowering` said arm into contact withthe stop, a key shank insertible horizontallyk intothe casing throughthe keyhole therein, oppositely extending radial wings formed on theinner end of said shank, a shoulder on the extension plate disposed inthe path of one wing, and a pair of depending stops formed integrallywith the lower side of the tumbler arm and Vhaving their inner facesdisposed in' the path of the other wing for frictional contact with thelatter to prevent easy rotation of the key shank. y

2.v A lock comprising a casing having in one side a keyhole, a boltslidable horizontally in said casing and-having a notch in its upperside, an extension plate extending rearwardly from said bolt'below thekeyhole, a horizontally disposed tumbler arm pivoted at its front endabove the bolt and having its rear end disposed above the keyhole, astop depending from the tumbler arm for reception in the aforesaid notchto control the movement of the bolt, a key shank insertible horizontallyinto the casing through the keyhole and having on its inner end a pairof oppositely extending radial wings, a shoulder on the extension platedisposed in the path of one of said wings, a pair of depending stopsformed integrally with the lower side of the tumbler arm having theirinner faces disposed in the path of the lother wing for frictionalcontact therewith to prevent easy turning of the key shank, a rigid stopcarried by the casing and disposed beneath the rear end of the tumblerarm in contact with the rearmost of the pair of stops on said arm,whereby to assist in receiving rearward thrusts exerted on said tumblerarm by attempted retraction Vof thebolt, and a spring for normallylowering the tumbler arm into contact with the last named stop.

In testimony whereof. we have hereunto setour hands in presence of twosubscribing witnesses.

JOSEPH M. RONALTER. JOSEPH P. BAUBY. Witnesses:

FREDERICK C. BAUBY, Louis V. HAYES.

five cents each, by addressing the Commissioner of Patents,'l/Vashington, D. C.

